531240981938 has 16 divisors (see below), whose sum is σ = 805134876000. Its totient is φ = 262863086976.

The previous prime is 531240981923. The next prime is 531240981941. The reversal of 531240981938 is 839189042135.

It is a self number, because there is not a number n which added to its sum of digits gives 531240981938.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2803313 + ... + 2986811.

It is an arithmetic number, because the mean of its divisors is an integer number (50320929750).

Almost surely, 2^531240981938 is an apocalyptic number.

531240981938 is a deficient number, since it is larger than the sum of its proper divisors (273893894062).

531240981938 is a wasteful number, since it uses less digits than its factorization.

531240981938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198521.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 531240981938 in words is "five hundred thirty-one billion, two hundred forty million, nine hundred eighty-one thousand, nine hundred thirty-eight".